Summary: Program for executing the same command on many hosts in parallel

shmux is program for executing the same command on many hosts in parallel.
For each target, a child process is spawned by shmux, and a shell on the
target obtained one of the supported methods: rsh, ssh, or sh. The output
produced by the children is received by shmux and either output in turn to
the user, or written to files for later processing.